Pubdate: Tue, 28 Aug 2007 Source: New York Times (NY) Copyright: 2007 The New York Times Company Contact: http://www.nytimes.com/ Details: http://www.mapinc.org/media/298 Referenced: http://www.mapinc.org/drugnews/v07/n979/a09.html Author: Abraham L. Halpern, M.D. A DRUG'S SIGNATURE To the Editor: Re "Telltale Isotopes in Marijuana Are Nature's Tracking Devices" (Aug. 21): Violent crimes go unsolved every day, but we waste limited resources performing elaborate forensic tests on medical marijuana seized from licensed dispensaries operating legally under state laws. If the federal government is so interested in tracking medical marijuana's origins, simply stop forcing desperate patients into the shadows, and instead provide them safe, legal access to medical marijuana. ABRAHAM L. HALPERN, M.D. Mamaroneck, N.Y. - --- MAP posted-by: Richard Lake